High-end technology: the full LED headlights 2011 Audi A8


High-end technology - the full LED headlights 2011 Audi A8

High-end technology - the full LED headlights 2011 Audi A8

The high-end solution on board the new A8 is the full LED headlights. They give the big sedan an unmistakable appearance even in daylight and even more so after the fall of darkness. Their revolutionary optics mean a departure from the large, tubular light modules commonly used today.

The low beams comprise ten individual modules forming an arc situated below the wing-shaped chrome contour known as the ‘wing.’ Just below this is another arc of 22 white and 22 yellow LEDs for the daytime running lights and the turn signals. Their thick wall technology makes them appear from the outside as homogenous, continuous strips of light.

Located above the wing are the high beams, whose light is generated by two powerful four-chip LEDs and a free surface reflector system. An assistant switches between the high and low beams, and additional high-power LEDs generate the highway light and cornering light. A separate fan and heat sink moderate the system’s temperature.

The full LED headlights offer a number of functional advantages in everyday situations. With a color temperature of 5,500 Kelvin, their light resembles daylight and thus is much less tiring to the eyes. They also offer efficiency advantages. The low beams, for example, consume only 40 watts per unit, a bit less than the already highly efficient xenon plus headlights.

The side view of the new Audi A8 also gives the image of concentrated and forward-thrusting power. Typically for the Audi line, the vehicle line makes up two-thirds of the height, with the remaining third falling to the greenhouse. From the single-frame grill Audi’s characteristic Tornado line runs as a light edge just beneath the window sill. The line continues close above the wheel arches, giving the A8 a powerful appearance on the road.

The surfaces below the Tornado line interpret the interplay of light and shadow, of convexity and concavity, and are statement of seriousness and timeless elegance. Proceeding downwards, the surfaces are framed by the rising dynamic line running above the side sills. Large wheels – from 17 to 21 inches in diameter – fill the wheel arches pulled out wide.

At the rear the separation edge gives an impression of sleekness, which further reinforces the impressively sculptured surfaces. A chrome strip underlines the width of the sedan, terminating in a diffuser.

The tail lights also produce an appearance both three-dimensional and striking – and typically Audi. They, too, use LED technology with 72 light-emitting diodes per unit. Chip-on-board LEDs, which can be packed tightly together with high precision, are used in many areas due to the limited amount of space available.

The tail lights, which consume only 9 watts per unit, form a trapezoidal contour that appears as an even, homogenous strip. Its upper §egmènt is a light guide – a plastic tube; the lower section is a reflective, textured free-form surface. It is thicker than the upper §egmènt to optically lower the center of gravity of the A8′s back end. The turn signal is a horizontal line. The five-§egmènt brake light is located inside the trapezoid.

Source: conceptcarz

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